Cocktail shaker



FIG. 1 is a perspective view of a cocktail shaker;

FIG. 2 is a front elevational view thereof; the rear elevational view being a mirror image thereof;

FIG. 3 is a left side view thereof; the right side view being a mirror image thereof;

FIG. 4 is a top view thereof; and,

FIG. 5 is a bottom view. 

CLAIM The ornamental design for a cocktail shaker, as shown, and described. 